Abstract
Based on the randomness of the concrete meso-structure and the influence of damage at the interface layer, a predictive method for the mechanical properties of concrete at ultra-low temperatures is proposed in this paper. In this method, the mechanical properties of aggregate and mortar materials at ultra-low temperatures are input parameters, the concrete random meso-structure is constructed using the Monte Carlo method, and the interface damage models using interface normal tensile failure are established. Based on the homogenization theory, the concrete macroscopic mechanical properties at ultra-low temperature can be predicted by statistical analyses of numerical simulation tests. The results showed that the properties were consistent with reported results, which verified the correctness of the proposed method.
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